Starrett 54325 O1 Tool Steel Flat Stock 5/32x3/4x36 in

Product Description

The STARRETT 54325 is an O1 oil-hardening tool steel flat stock bar sized at 5/32 inches thick, 3/4 inches wide, and 36 inches long. Manufactured to AISI Type O1 specification, this flat stock is suited for toolmakers, machinists, and die makers who require tight dimensional tolerances and predictable heat-treat response. Thickness tolerance is held to plus or minus 0.001 inches, making it a reliable choice for precision tool and die applications where stock removal and finish grinding are part of the workflow. The bar ships at approximately 1.2 pounds and is ready for layout, machining, and subsequent oil-hardening heat treatment.

O1 tool steel flat stock of this profile is commonly used in the fabrication of punches, dies, gauges, jigs, fixtures, and blades in both job-shop and production toolroom environments. The 36-inch length provides enough material for multiple short workpieces or a single long component. Machinists typically rough-cut to near-net shape, finish grind, then harden and temper to the desired hardness for the application. This stock is appropriate for low-to-medium production tooling where oil-quench hardenability and good wear resistance are required.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable, controlled heat treatment
• Thickness held to plus or minus 0.001 inches for minimal stock removal before finish grinding
• Width tolerance of 0.000 to minus 0.005 inches ensures consistent fit in toolroom setups
• Length tolerance of plus 0.015 inches gives full usable stock on every bar
• Edge squareness held to 0.003 inches per inch across all edges
• Single 36-inch bar format suits both single-piece and multi-piece toolroom jobs

Compatibility

Designed as a standard O1 oil-hardening tool steel flat bar suitable for general toolroom, die-making, and precision machining applications requiring AISI Type O1 material specification.

Installation Notes

Cutting and machining of tool steel flat stock should be performed by qualified machinists using appropriate metalworking equipment and cutting fluids. Secure the workpiece firmly before any cutting or grinding operation. Heat treatment, including oil quenching and tempering, should follow established metallurgical procedures for AISI O1 tool steel and be performed by personnel experienced with tool steel heat treatment. Allow the bar to reach room temperature before taking final dimensional measurements.